* smt32_common.mk: reduce copy-paste
* SENT: sentPins is not used
* hw: stm32: add ICU helper
* hw: stm32: icu helpers: also return timer base clock
* SENT: icu: use helper to get ICU & channel and AF
* SENT: icu: use CPU ticks for pulse measurements
* hw: stm32: icu: cleanup
* SENT: cache current setting to do proper clean-up on stop
* SENT: microRusEfi supports send on "AN temp 2" = PA1 only
* SENT: microRusEfi: fix pin number
* SENT: use activeConfiguration during sentStop()
* MRE: pin 23: can accept events (for SENT)